hello to everybody,
sorry for my bak english.

I have a check constraint (check_3) in a table like this (check
totaldiscount>-1)

I need inactive this check and run this instruction

alter trigger check_3 inactive

firebird return an error:

MODIFY TRIGGER failed
action cancelled by trigger (1) to preserve data integrity
Cannot update trigger used a CHECK constraint.

Somebody helps me.
Thanks